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    <title>Document</title>
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    <div class="box box1">
        <ul>
            <li>1</li>
            <li class="active">2</li>
            <li>3</li>
        </ul>
        <ol>
            <li>1</li>
            <li class="active">2</li>
            <li>3</li>
        </ol>
    </div>
    <div class="box box2">
        <ul>
            <li>1</li>
            <li class="active">2</li>
            <li>3</li>
        </ul>
        <ol>
            <li>1</li>
            <li class="active">2</li>
            <li>3</li>
        </ol>
    </div>

    <script type="module">
        import Tab from './utils.js'
        const tab1 = new Tab('.box1', {})
        const tab2 = new Tab('.box2', {})
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